Title :
Design of robust and chattering-free rational controllers
Author_Institution :
Univ. of Trinidad & Tobago, Couva, Trinidad and Tobago
Abstract :
New chattering-free feedback design for a class of perturbed nonlinear systems is presented. The idea is basically founded on uniting rational-power feedbacks with rational-type feedbacks that approximate the sign function. We show that the degree of smoothness of the applied controller depends essentially upon the number of the rational-power terms used in the expansion of the whole feedback. A detailed analysis of the balance between smoothness and global/practical stability is given.
Keywords :
control nonlinearities; control system synthesis; feedback; function approximation; nonlinear control systems; perturbation techniques; rational functions; robust control; variable structure systems; chattering-free rational controller design; global-practical stability; perturbed nonlinear system; rational-power feedback; rational-type feedback; robust control; sign function approximation; sliding mode control; Adaptive control; Automation; Control systems; Feedback control; Helium; Nonlinear control systems; Nonlinear systems; Robust control; Sliding mode control; Stability analysis; Chattering analysis; Rational-power feedbacks; Robust control; Sliding-mode;
Conference_Titel :
Control Applications, (CCA) & Intelligent Control, (ISIC), 2009 IEEE
Conference_Location :
Saint Petersburg
Print_ISBN :
978-1-4244-4601-8
Electronic_ISBN :
978-1-4244-4602-5
DOI :
10.1109/CCA.2009.5281090
